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How to Compare Objects in the Sky
How to Compare Objects in the Sky
There are many different kinds of objects in the sky. The Sun, the Moon, and comets, are some of the kinds of objects that scientists study in the sky. Scientists make comparisons between these different objects. Scientists compare these objects to learn about the ways that they are similar and different from each other and from Earth. Some scientists compare how far objects are from Earth and from each other in the sky. Other scientists measure the size of each object. Other comparisons can be made about what an object is made out of or it's temperature. You can compare these objects, too.
There are many different kinds of objects in the sky. The Sun, the Moon, and comets, are some of the kinds of objects that scientists study in the sky. Scientists make comparisons between these different objects. Scientists compare these objects to learn about the ways that they are similar and different from each other and from Earth. Some scientists compare how far objects are from Earth and from each other in the sky. Other scientists measure the size of each object. Other comparisons can be made about what an object is made out of or it's temperature. You can compare these objects, too.
Measuring Distance
Measuring Distance
In space, things are very far apart. They are so far apart that it would be very hard to measure how far apart they are in feet, or even miles. So, scientists use the Astronomical Unit to measure distance in space.
In space, things are very far apart. They are so far apart that it would be very hard to measure how far apart they are in feet, or even miles. So, scientists use the Astronomical Unit to measure distance in space.
The distance from Earth to the Sun is about 93 million miles! This distance is the same as 1 Astronomical Unit or AU. Astronomers are scientists who study space. Astronomers often use AU to figure out how far apart planets, stars, and other objects are.
The distance from Earth to the Sun is about 93 million miles! This distance is the same as 1 Astronomical Unit or AU. Astronomers are scientists who study space. Astronomers often use AU to figure out how far apart planets, stars, and other objects are.
A human traveling in a spacecraft moves at a speed of about at 25,000 mph. The authors is this website used this speed to figure out how long it would take to reach objects in space from Earth. For example, it would take 3,740 hours, or about 156 days, or about 5 months for a human to travel one AU in a spacecraft.
A human traveling in a spacecraft moves at a speed of about at 25,000 mph. The authors is this website used this speed to figure out how long it would take to reach objects in space from Earth. For example, it would take 3,740 hours, or about 156 days, or about 5 months for a human to travel one AU in a spacecraft.
Measuring Size
Measuring Size
Diameter is the distance across a round object from one end to the other. Objects in space are mostly round, or sphere-shaped. These objects can be very large. Diameter is one way to compare the size of objects in the sky. Because objects in space are so large, the diameter is measured in miles.
Diameter is the distance across a round object from one end to the other. Objects in space are mostly round, or sphere-shaped. These objects can be very large. Diameter is one way to compare the size of objects in the sky. Because objects in space are so large, the diameter is measured in miles.
Objects in the Sky to Compare
Objects in the Sky to Compare
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